Spring mattress or cushion



.R. BRADSHAW.

SPRING MATTRESS OR CUSHION.

APPLICATION FILED JULY 22, 1918.

Patented Feb. 22, 192L i 7 M Q i UNITED. ST A T NQT OFFICE,

RICHARD,1BRA DSHIJAW, 0F MONT EAL; Q EBEGQ ANADA, 4

SPRING MATTRESS QR Cessna To all whom it may concern: I

Be it known that I, RICHARD BnADsHAw, a subject of the King of Great Britain, and resident of the city of Montreal, in the Province of Quebec and Dominion of Canada, have invented certain new and useful Improvements in Spring Mattresses or Cushions, of which the following is a full, clear, and exact description. V V

This invention relates to improvements in a construction of spring mattresses or spring upholstery generally, and the object of the invention is to providea rugged and rigid construction which may be produced at a very small cost and which presents economy in the use of metal. a

At the present time, the bottom frames of spring mattresses and the like are'constructed of bars of LrSBCtiOIl, riveted together, and the top frame is constructed of a rod bent to suitable form and having its ends connected by a sleeve or clip, I have found that such structure is unsatisfactory in use, as the. riveted bottom frame soon works loose and the top frame develops weakness at the joint. The structure is furthermore extremely wasteful of'material, and in addition requires a number of manufacturing operations,'which have been eliminated according to this invention.

The improved mattress comprises a bottom frame of flat bars or straps bent to suitable form and connected by electric weld ing, so that absolute rigidity is assured. The upper frame is a wire rod as before but its ends are electrically welded together, so that uniform strength throughout is obtained. 7 V

In the drawings which illustrate the invention;-

Figure 1 is a plan view of a mattress. constructed according to this invention.

Fig. 2 is a side elevation. f V

Fig. 3is a cross section. on the line 33, Fi 2.

lieferring more particularly to the drawings, 11 designates the longitudinal members of a bottom frame, which are all perfectly.

plain strap iron. vThese longitudinal members are connected at the ends and at intermediate points by transverse members 12, which are also flat strap metal, these transverse members are disposed in horizontal planes at their ends and preferably lie under the longitudinal members, to which they are secured by electric spot welds 13. Ad a-.

' Specification of Letters Patent.

BatentedFeb.

Application filed July 22, 1918. Serial No. 246,121.

cent the ends, the members 'aretwisted, sothat. the main portion ofeach member lies in vertical i plane; These vertically dis-* posed partsgare apertured (not: shown'fin the usual manner to receive longitudinally disposed wires 14:, to which helical spiral springs 15 are secured. -Adjacent each end of each side member 11 and at the center thereof, L-shaped members 16 are secured by electric spotwelds. These members are formed by bending short lengths of thesame material as the members 11 and 12 through an angle of 90. The members 16 are attached each by one arm to the under side of the members 11 and with the other arm depending at the inner edge of the side member. These members 16, which form depending lugs, serve to hold the structure, if it is a mattress, against lateral movement on a bedstead, and if it is a seat cushion or the like, against movement in the supporting framework. 7

Theupper frame 17 of the mattress is a 'rod or tube bent to proper form and having its ends electrically welded together, as at 18. Longitudinal and transverse wires 19 and 20 are stretched in the frame 17 and are connected to the upper ends of the springs 15 in any suitable way From the foregoing description, it will be seen. that the under frame is constructed of a minimum amount of the lowest-priced and most easily obtainable material, and in such a manner that it will remain absolutely rigid. The elimination of rivets not only provides a more rigid structure but reduces the number of operations and the cost of construction. It will be noted that the lugs 16 are placed between the transverse members and that all are connected on the under side of the longitudinal side pieces, so that the side piece is supported a uniform distance throughout its length above any frame on whichv it rests. The load sustaining members 12 are disposed to utilize their strength to the best advantage. The top. frame of the construction is of uniform strength and rigidity throughout and is an endless member which has no inherent weakness at one spot. While it is preferred to weld the hottom member, it will be'understood that the parts may be riveted or otherwise secured together. Also, while it has been stated that the transverse members and L-shaped members are secured under the side pieces, it is obvious that they may be secured to the upper surface of the side pieces. While it is preferable that all parts be attached, to the same surface of the side pieces, it is not essential and they may be attached some to the upper surface and some to the lower surface if so desired. y 7

Having thus'described my invention, what I claim isg-r gv In a device of the class described, a bottom frame comprising longitudinal and transverse flat members arranged in sub-- stantially the same horizontal plane, the ends of the transverse members being connected fiatwise to corresponding surfaces of the longitudinal members, and L-shaped members se'c'uie'd each by one arm to the same surface of the longitudinal members as the transverse members, theiremaining arms of said L-shaped members depending from adjacent edges of the longitudinal members,

' the L-shapedmernbers being disposed intermediate the transverse members.

In wltness whereof, I have hereunto set my hand.

RICHARD BRADsnAW, 

